وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، مَوْلَى ابْنِ عُمَرَ أَنَّ رَجُلاً، مِنْ أَهْلِ مِصْرَ أَخْبَرَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ قَرَأَ سُورَةَ الْحَجِّ فَسَجَدَ فِيهَا سَجْدَتَيْنِ ثُمَّ قَالَ إِنَّ هَذِهِ السُّورَةَ فُضِّلَتْ بِسَجْدَتَيْنِ ‏.‏

Yahya related to me from Malik from Nafi, the mawla of Ibn Umarthat a man from Egypt told him that Umar ibn al-Khattab recited Suratal-Hajj (Sura 22) and prostrated twice in it, and then said, "Thissura has been given special preference by having two prostrations init." Translation Not Available

Book Ref: Muwatta Imam Malik Book 15 Hadith 485
Web Ref:  Muwatta Imam Malik Book 15 Hadith 13